BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
Go Back   6Post.com | BMW 6-Series Forum > BMW 6 Series Forum > General 6-Series Coupe, Convertible, and Gran Coupe Forum

Post Reply
 
Thread Tools Search this Thread
      10-24-2016, 09:49 PM   #1
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

650ix with M6 rear diffuser and square exhaust tip removal

I will post a quick how-to with more pictures later this week for anyone that might want to do this because this was honestly a littler harder project than I had originally thought for a regular home garage do-it-yourself like me.

The first picture is the original diffuser with the square tips. The other pictures are the result
Attached Images
   

Last edited by skilz4u2nv; 11-05-2016 at 12:08 PM.
Appreciate 0
      10-25-2016, 10:40 AM   #2
upstate650
Major
upstate650's Avatar
United_States
135
Rep
1,447
Posts

Drives: 2014 650xi Gran Coupe Msport
Join Date: May 2013
Location: The Hinterlands of Upstate NY

iTrader: (3)

Garage List
nice. where did you get the diffuser? I was wondering how the 650 exhaust length would work with ///M diffuser. is that a 650 exhaust mounted with hangers in standard position or did you have to adjust?
__________________
2014 BMW 650xi Gran Coupe Msport Black Sapphire Metallic on full black merino leather. 20" M5 343M wheels for summer, 20" 373 wheels for winter with Nokian Hakkapeliitta 8 studded snow tires. M6 CP exhaust with M6 Diffuser and ///M Performance carbon fiber finisher. Mission Performance stage 1.5 and transmission tune.
Appreciate 0
      10-25-2016, 01:04 PM   #3
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

Quote:
Originally Posted by upstateX5M View Post
nice. where did you get the diffuser? I was wondering how the 650 exhaust length would work with ///M diffuser. is that a 650 exhaust mounted with hangers in standard position or did you have to adjust?
That is the oem 650i exhaust.. no modification to the exhaust was needed other than cutting the square tips off. only problem is you cant just cut the two pipes out because you wont have enough space to clamp on the new tips. The vacuum flap assembly is too close.. only gives you a few inches to play with
Appreciate 0
      10-25-2016, 05:00 PM   #4
upstate650
Major
upstate650's Avatar
United_States
135
Rep
1,447
Posts

Drives: 2014 650xi Gran Coupe Msport
Join Date: May 2013
Location: The Hinterlands of Upstate NY

iTrader: (3)

Garage List
Quote:
Originally Posted by skilz4u2nv View Post
That is the oem 650i exhaust.. no modification to the exhaust was needed other than cutting the square tips off. only problem is you cant just cut the two pipes out because you wont have enough space to clamp on the new tips. The vacuum flap assembly is too close.. only gives you a few inches to play with
Oh!! Thought that was a meghan exhaust by the rainbow colors. Where did you score an M6 diffuser? I need one in Black Sapphire!!!!
__________________
2014 BMW 650xi Gran Coupe Msport Black Sapphire Metallic on full black merino leather. 20" M5 343M wheels for summer, 20" 373 wheels for winter with Nokian Hakkapeliitta 8 studded snow tires. M6 CP exhaust with M6 Diffuser and ///M Performance carbon fiber finisher. Mission Performance stage 1.5 and transmission tune.
Appreciate 0
      10-25-2016, 06:29 PM   #5
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

Quote:
Originally Posted by upstateX5M View Post
Oh!! Thought that was a meghan exhaust by the rainbow colors. Where did you score an M6 diffuser? I need one in Black Sapphire!!!!
You are right, has the Megan exhaust look but saved a lot of money! Those are just the tips.
The diffuser I got lucky and found someone who just so happened to be selling an Alpine White M6 diffuser. Every once in a while you will see a member on here sell theirs but you can get them on ebay or from bmw themselves.
Appreciate 0
      10-25-2016, 06:37 PM   #6
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

I attached some more pictures... From start to finish..
Again I will post a quick how-to later on when I have a chance but the pictures give you an idea for now.
Attached Images
       
Appreciate 0
      10-25-2016, 09:06 PM   #7
Bobby_Drake
Captain
Bobby_Drake's Avatar
Philippines
123
Rep
833
Posts

Drives: '16 X5M
Join Date: Oct 2012
Location: San Diego, CA

iTrader: (0)

Looks good. Nice work.
Appreciate 0
      10-26-2016, 10:24 PM   #8
Zack G.
Extraordinaire
Zack G.'s Avatar
United_States
31
Rep
354
Posts

Drives: '14 650i MSport CP
Join Date: Dec 2011
Location: South FL

iTrader: (0)

Looks great and I agree, I thought it was a Megan setup at first as well!

I would never be brave enough to attempt a DIY tip replacement like that as I've got 2 left hands

Congrats...looks fantastic! You probably saved a ton of cash!
Appreciate 0
      11-05-2016, 12:14 PM   #9
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

Quote:
Originally Posted by Zack G. View Post
Looks great and I agree, I thought it was a Megan setup at first as well!

I would never be brave enough to attempt a DIY tip replacement like that as I've got 2 left hands

Congrats...looks fantastic! You probably saved a ton of cash!
Thanks... Yea the Megan exhaust I believe is around $700 without installation..
This whole project cost me ~$80 for the round tips (can be cheaper or more expensive depending on the style and type of tip you would like to use), ~$5 for a can of black spray paint and a whole lot of nerves to take a reciprocating saw to a perfectly fine and functioning exhaust system.
Appreciate 0
      11-06-2016, 10:16 AM   #10
7isPerfect
Private First Class
7isPerfect's Avatar
Canada
12
Rep
184
Posts

Drives: F06 650I
Join Date: Apr 2011
Location: Toronto

iTrader: (2)

where did you get that M6 diffuser from? BMW?
so to do quad setup, i have to remove the mpackage black diffuser you had in the beggining and put that M6 diffuser right? and then maybe get another carbonfiber diffuser that goes underneath it?
Appreciate 0
      11-06-2016, 07:53 PM   #11
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

Quote:
Originally Posted by 7isPerfect View Post
where did you get that M6 diffuser from? BMW?
so to do quad setup, i have to remove the mpackage black diffuser you had in the beggining and put that M6 diffuser right? and then maybe get another carbonfiber diffuser that goes underneath it?

Correct, the black M-Sport lower diffuser has to be removed and either thrown away or sold to someone else (my experience has been that no one wants that piece so it found its way to the garbage bin)

I was really lucky however, I found a nice guy not too far from me who just so happened to be selling an Alpine White M6 rear diffuser on craigslist for pretty cheap. He had upgraded to another carbon fiber piece I believe and he had no use for this one anymore.
If you cant get that lucky they do sell them online.. I want to say that it is BMW part#51128052677. Only problem is that if you buy it online it will most likely only come primed and you will have to take it to a paint shop to get it color matched to your car, or do a completely different accent color. I would venture a guess that the piece online will cost you about $150-$250 depending on the website and you will spend another ~$150 to paint it.

The plan is to get the other carbon fiber diffuser that goes underneath that like the one Vorsteiner sells but they are really expensive; north of $2000 just for that piece uninstalled. There are some China knockoffs on ebay for half the price but I am a little leery of those.
Appreciate 0
      11-26-2016, 03:51 PM   #12
Chief F1 Fan
Private First Class
Chief F1 Fan's Avatar
42
Rep
110
Posts

Drives: 650i xDrive Gran Coupe, 335xi
Join Date: Mar 2015
Location: WNY

iTrader: (0)

Nice work OP, that looks great. Might have to add this mod to my next Spring's to-do list when the car comes back out of storage.
__________________
2004 350Z Roadster, 2011 335i 6spd.
2014 650i xDrive, 2018 Mazda CX-9
Appreciate 0
      01-23-2017, 02:16 PM   #13
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

updated pics

updated picture of the finished product with a carbon fiber rear lip
Attached Images
 
Appreciate 0
      01-27-2017, 01:00 AM   #14
e46revspeed
Captain
e46revspeed's Avatar
74
Rep
618
Posts

Drives: F06 & E89
Join Date: Jul 2008
Location: oc

iTrader: (6)

nice....where did u get the carbon sideskirt extensions?
__________________

Squattin on Megan Racing and Vertini Monaco
Appreciate 0
      03-31-2017, 11:00 AM   #15
$howtime456
Lieutenant
$howtime456's Avatar
83
Rep
516
Posts

Drives: BMW 640i
Join Date: Mar 2017
Location: NY

iTrader: (0)

Quote:
Originally Posted by skilz4u2nv View Post
updated picture of the finished product with a carbon fiber rear lip
looks nice. where did you get the tips from?
Appreciate 0
      03-31-2017, 10:55 PM   #16
MSUGOGRN
Second Lieutenant
33
Rep
232
Posts

Drives: 2014 Black 650i xDrive Vert
Join Date: Jan 2017
Location: Denver, CO

iTrader: (1)

Just in case skilz doesn't respond soon (love to hear what he really went with as his car is fantastic), I have done a lot of research on this and I believe the 650 has 2.25" outs from the muffler and his appear to be the 3.5" wide outlets. So just find 2.25" inlet burned blue with 3.5" outlet. For this mod you will need 4 individual tips like that. I am looking to do a similar modification but with a muffler delete but I would like to have four inch wide outs.
Appreciate 0
      03-31-2017, 11:16 PM   #17
upstate650
Major
upstate650's Avatar
United_States
135
Rep
1,447
Posts

Drives: 2014 650xi Gran Coupe Msport
Join Date: May 2013
Location: The Hinterlands of Upstate NY

iTrader: (3)

Garage List
640 has a single outlet from muffler I believe, though, so you will need to account for that. Not sure about 640 msport though?
Appreciate 0
      04-12-2017, 01:58 PM   #18
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

Sorry guys, I have been MIA from the forums for a while.
I answered back all the PMs from my inbox (again sorry for the delay in responding)


The tips I got from Amazon. They are the adjustable ones just in case I didn't like the blue flamed tips I could easily replace it and/or adjust them.
I guess the proper way would have been to weld them on but so far after a few months they have stayed in place and held the spacing well.
I would put a link on here to the exact tips I bought but i'm not sure that complies with 6post's terms of service.
Appreciate 0
      04-12-2017, 04:44 PM   #19
MSUGOGRN
Second Lieutenant
33
Rep
232
Posts

Drives: 2014 Black 650i xDrive Vert
Join Date: Jan 2017
Location: Denver, CO

iTrader: (1)

Quote:
Originally Posted by skilz4u2nv View Post
Sorry guys, I have been MIA from the forums for a while.
I answered back all the PMs from my inbox (again sorry for the delay in responding)


The tips I got from Amazon. They are the adjustable ones just in case I didn't like the blue flamed tips I could easily replace it and/or adjust them.
I guess the proper way would have been to weld them on but so far after a few months they have stayed in place and held the spacing well.
I would put a link on here to the exact tips I bought but i'm not sure that complies with 6post's terms of service.
Welcome back skilz! This thread got me really excited about achieving a similar look on my car as yours and I am getting pretty close now. Just curious...did you end up going with 3" or 3.5" wide tips? I am definitely moving forward with a muffler delete and I will have the same v style rear diffuser that wraps underneath the tips.

Here's my issue and hoping others may be able to help. I really want 4" quad burnt tips but it is impossible to find a 3" in with the dual 4" out, burnt, and staggered. Below are the closest on ebay. Now...I am being told by my muffler shop that they could cut off one of the welds and shave off about 1/4" and then re-weld back on to achieve the staggered look. I actually think I may end up going down that path unless any of you helpful gents has another suggestion or advice.



The other option I have is to find a y pipe adapter with a 3" inlet and dual 2.5" outs and then do single burnt tips. See following pics.




The problem is the measurement from center to center on most of these is exactly 4" which would mean my single 4" wide tips when welded on would be touching. Long stretch here but has anybody found a y adapter that has a little more spacing center to center? I really want the 4" tips to achieve look like the following:

Appreciate 0
      04-12-2017, 09:56 PM   #20
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

MSUGOGRN,
Is it an option to just weld on a reducer to the back of the tips to get your the inlet diameter you need? If the intent is to delete the muffler then you should have alot of room to play with in pipe length and fitment.

For the people that want to keep the muffler then you are more restricted in what you can do. I would say max diameter pipe you can go with is 3" because the existing pipes coming out of the mufflers are really close together. Anything 3.5" and over in outlet diameter I dont believe will fit. Mine are 3" and I only have about a 1/4" between the 2 tips. I will try to take a better overhead picture to show you.
Also I haven't really gotten into it much but length of the tip is also very important for the muffler keeping crowd. The vacuum flap assembly is the furthest back you can push the tips which isnt far at all so keep that in mind when buying your exhaust tip of choice. Too long and they will stick out too far from the diffuser. Too short and they will be hidden.

Again if you are doing a full muffler delete then I think you will have enough room to reduce or expand the pipe to an inlet diameter of your choosing and also bend the pipe to get your tips to the final desired location you want.
Appreciate 0
      04-12-2017, 10:14 PM   #21
skilz4u2nv
New Member
1
Rep
26
Posts

Drives: 2014 BMW 650xi
Join Date: Aug 2016
Location: NJ

iTrader: (0)

Added a couple more pictures so that you guys can see the fitment.
Attached Images
    
Appreciate 0
      04-13-2017, 11:09 AM   #22
MSUGOGRN
Second Lieutenant
33
Rep
232
Posts

Drives: 2014 Black 650i xDrive Vert
Join Date: Jan 2017
Location: Denver, CO

iTrader: (1)

Thanks for the pics. Now I am starting to reconsider this whole delete thing and may go cat back. Ugh...decisions decision.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 09:12 PM.




6post.com
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST